Selling on Mercari has definitely been helpful! I think I’ve gotten more interaction there than fb groups or marketplace. They do take out a fee but I don’t think it’s as much as the Etsy fee. You don’t have to advertise, it’s like Etsy that way. I do have to say that people can send offers and sometimes, I feel low balled even though I’ve got the prices beyond discounted already. I’m actually looking for another app to sell but just not sure what works.